Been lurking (pre-research.. lol) on the forum for a little while now... Finally getting all the pieces together to build a forged std. bore 350.

I'm building this engine for my 1971 C10 step side (700r4 w/ 2500 stall, 3.73 gears, 3500lbs)it's going to be my weekend driver and occasion work truck too. I ride a motorcycle as my year round daily so I'm not too concerned with fuel consumption. I would like to run 93 octane.

i dont think he wants to run .067. thats what he will end up with, as i understand it, using what he has without making a lot of changes.

i would go with a better cam also. personally, i prefer custom grinds. they arent that much more expensive.

are those heads aluminum ? aluminum heads will be a big help keeping you on pump gas.

Not knowing the heads the cam grinder will be throwing darts at the board guessing.

I will never buy a shelf cam after dealing with Mike Jones(east coast) and John D (40 miles from me) For $30 more on a flat solid and $80 more for a roller with the cast distributor gear compared to Comp you can't go wrong.

After doing more research I'm thinking I'll probably just mill the pistons. I still need to inspect them to verify they are solid though and then mill the dome off flat. I'm currently working in Saudi Arabia and figured I'd decide what to do while sitting on my butt waiting for prayer times (5x/day).

When I calculate 0cc dome w/ .015 gasket and 0 deg timing, it puts my dynamic compression at 8.14:1 and quench at .040. According to the majority of what I have read over the past 3 days, this is optimum for a street/strip engine.

I'm not looking to spend alot on this build. I found out that this shortblock was know to run 11.5 @ about 115 in a 1st gen Camaro on pump gas that he drove to the track before I purchased it... I believe the only difference was he had 76cc heads.
Since this combo ran so well before... I'm feeling pretty confident in it's durability.... just worried about detonation more than anything.

I am curious why there is so much question over the Comp Mutha Thumper cam???

Thanks for the input,
Brent_________________There's no replacement for displacement... Except for BOOST!

thumper series Q .......IF YOU ALREADY HAVE IT USE IT
but a custom grind will give you lost drivability,torque, or horsepower over that marketing stick
every situation needs its own cam
n20 different cam
supercharger another different cam
turbo another different cam
n/a u guessed it another different cam

so where does the thumper series fit in you ask?.................car shows and street rods_________________

so where does the thumper series fit in you ask?.................car shows and street rods

EXACTLY!!!!! the guys that buy those just like the sound. the only time those cars get close to a race track is when theres a show in the parking lot. LOTS of power left on the table just for the sake of sounding cool. but hey, ya can tell em its a 3/4 race cam and you will get lots of oos and aahs ._________________

so where does the thumper series fit in you ask?.................car shows and street rods

EXACTLY!!!!! the guys that buy those just like the sound. the only time those cars get close to a race track is when theres a show in the parking lot. LOTS of power left on the table just for the sake of sounding cool. but hey, ya can tell em its a 3/4 race cam and you will get lots of oos and aahs .

Trying to think back I believe Crower had their Beast line of cams that sounded great to someone that don't know what a small block should sound like. And they were flat hydraulic to boot. I remember racing a guy that had one of those cams and claimed he shifted between 8 and 9 thousand. What a Joke. I shifted at 7800 with my solid Isky. and he was not even close. I told him to switch the Tach from 6 cylinder to 8 cylinder and never seen the car again.

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